./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-1.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/vogal-1.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:31:19,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:31:19,675 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:31:19,680 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:31:19,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:31:19,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:31:19,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:31:19,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:31:19,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:31:19,707 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:31:19,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:31:19,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:31:19,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:31:19,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:31:19,708 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:31:19,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:31:19,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:31:19,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:31:19,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:31:19,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:31:19,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:31:19,712 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:31:19,712 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:31:19,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:31:19,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:31:19,713 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:31:19,713 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:31:19,715 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:31:19,716 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:31:19,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:31:19,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:31:19,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:31:19,718 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:31:19,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:31:19,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:31:19,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:31:19,941 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:31:19,941 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:31:19,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/vogal-1.i [2024-09-18 15:31:21,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:31:21,250 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:31:21,250 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/vogal-1.i [2024-09-18 15:31:21,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c5ef79f45/1ce6457494804a9b8ea7d069fa37c26c/FLAGd108940b6 [2024-09-18 15:31:21,267 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c5ef79f45/1ce6457494804a9b8ea7d069fa37c26c [2024-09-18 15:31:21,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:31:21,269 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:31:21,274 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:31:21,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:31:21,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:31:21,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3be1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21, skipping insertion in model container [2024-09-18 15:31:21,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,295 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:31:21,415 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/vogal-1.i[895,908] [2024-09-18 15:31:21,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:31:21,436 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:31:21,444 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/vogal-1.i[895,908] [2024-09-18 15:31:21,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:31:21,465 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:31:21,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21 WrapperNode [2024-09-18 15:31:21,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:31:21,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:31:21,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:31:21,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:31:21,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,483 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:31:21,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:31:21,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:31:21,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:31:21,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:31:21,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,495 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,509 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [13, 2, 6]. 62 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [11, 2, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-09-18 15:31:21,510 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,510 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:31:21,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:31:21,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:31:21,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:31:21,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (1/1) ... [2024-09-18 15:31:21,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:31:21,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:21,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 15:31:21,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 15:31:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:31:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:31:21,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 15:31:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:31:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:31:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:31:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:31:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 15:31:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 15:31:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 15:31:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:31:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:31:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 15:31:21,658 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:31:21,660 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:31:21,833 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-18 15:31:21,833 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:31:21,850 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:31:21,853 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-18 15:31:21,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:31:21 BoogieIcfgContainer [2024-09-18 15:31:21,853 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:31:21,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:31:21,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:31:21,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:31:21,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:31:21" (1/3) ... [2024-09-18 15:31:21,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80d8f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:31:21, skipping insertion in model container [2024-09-18 15:31:21,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:31:21" (2/3) ... [2024-09-18 15:31:21,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80d8f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:31:21, skipping insertion in model container [2024-09-18 15:31:21,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:31:21" (3/3) ... [2024-09-18 15:31:21,859 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2024-09-18 15:31:21,870 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:31:21,870 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:31:21,906 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:31:21,910 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42276b76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:31:21,910 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:31:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:31:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 15:31:21,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:21,918 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:21,919 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:21,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1308321975, now seen corresponding path program 1 times [2024-09-18 15:31:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663505105] [2024-09-18 15:31:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663505105] [2024-09-18 15:31:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663505105] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:31:22,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:31:22,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:31:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706054549] [2024-09-18 15:31:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:22,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:31:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:31:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:31:22,104 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:22,125 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2024-09-18 15:31:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:31:22,127 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-18 15:31:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:22,131 INFO L225 Difference]: With dead ends: 64 [2024-09-18 15:31:22,131 INFO L226 Difference]: Without dead ends: 28 [2024-09-18 15:31:22,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:31:22,135 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:22,136 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-18 15:31:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-18 15:31:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-09-18 15:31:22,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2024-09-18 15:31:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:22,160 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-09-18 15:31:22,160 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-09-18 15:31:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-18 15:31:22,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:22,161 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:22,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:31:22,161 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:22,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash 516425503, now seen corresponding path program 1 times [2024-09-18 15:31:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172123204] [2024-09-18 15:31:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172123204] [2024-09-18 15:31:22,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172123204] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:31:22,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:31:22,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:31:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192379741] [2024-09-18 15:31:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:22,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:31:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:31:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:31:22,331 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:22,364 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-09-18 15:31:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:31:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-18 15:31:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:22,367 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:31:22,367 INFO L226 Difference]: Without dead ends: 41 [2024-09-18 15:31:22,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:31:22,368 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:22,369 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-18 15:31:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2024-09-18 15:31:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-09-18 15:31:22,377 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2024-09-18 15:31:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:22,378 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-09-18 15:31:22,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-09-18 15:31:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:31:22,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:22,379 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:22,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:31:22,381 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:22,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash 22246406, now seen corresponding path program 1 times [2024-09-18 15:31:22,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:22,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955351616] [2024-09-18 15:31:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955351616] [2024-09-18 15:31:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955351616] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555332217] [2024-09-18 15:31:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:22,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:22,503 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:31:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:22,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:31:22,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:31:22,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:31:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555332217] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:31:22,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:31:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-09-18 15:31:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058489718] [2024-09-18 15:31:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:22,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:31:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:31:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:31:22,632 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:22,682 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-18 15:31:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:31:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-18 15:31:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:22,684 INFO L225 Difference]: With dead ends: 53 [2024-09-18 15:31:22,684 INFO L226 Difference]: Without dead ends: 48 [2024-09-18 15:31:22,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:31:22,686 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:22,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-18 15:31:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2024-09-18 15:31:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-09-18 15:31:22,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2024-09-18 15:31:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:22,692 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-09-18 15:31:22,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:22,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-09-18 15:31:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:31:22,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:22,693 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:22,705 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:31:22,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:22,896 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:22,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 260967679, now seen corresponding path program 1 times [2024-09-18 15:31:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:22,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257548072] [2024-09-18 15:31:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:31:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:23,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257548072] [2024-09-18 15:31:23,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257548072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:23,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662657518] [2024-09-18 15:31:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:23,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:23,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:23,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:31:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:31:23,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:31:23,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:31:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662657518] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:31:23,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:31:23,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-09-18 15:31:23,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472316928] [2024-09-18 15:31:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:23,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:31:23,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:31:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:31:23,098 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:23,139 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2024-09-18 15:31:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:31:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-18 15:31:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:23,141 INFO L225 Difference]: With dead ends: 74 [2024-09-18 15:31:23,141 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:31:23,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:31:23,143 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:23,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:31:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:31:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-09-18 15:31:23,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2024-09-18 15:31:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:23,154 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-09-18 15:31:23,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-09-18 15:31:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:31:23,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:23,156 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:23,170 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:23,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:23,357 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:23,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:23,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1671267723, now seen corresponding path program 1 times [2024-09-18 15:31:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:23,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105291611] [2024-09-18 15:31:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:23,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:31:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105291611] [2024-09-18 15:31:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105291611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854862012] [2024-09-18 15:31:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:23,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:23,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:23,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:31:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:23,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:31:23,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:31:23,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:23,741 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-18 15:31:23,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2024-09-18 15:31:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:31:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854862012] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:23,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:31:23,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2024-09-18 15:31:23,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085701316] [2024-09-18 15:31:23,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:23,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:31:23,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:31:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:31:23,772 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:23,915 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2024-09-18 15:31:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:31:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-18 15:31:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:23,916 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:31:23,916 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:31:23,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:31:23,917 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:23,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:31:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-18 15:31:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-09-18 15:31:23,925 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 27 [2024-09-18 15:31:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:23,925 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-09-18 15:31:23,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:23,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-09-18 15:31:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:31:23,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:23,927 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:23,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:24,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:24,128 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash -400223430, now seen corresponding path program 1 times [2024-09-18 15:31:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202006713] [2024-09-18 15:31:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:24,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:31:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202006713] [2024-09-18 15:31:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202006713] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709600005] [2024-09-18 15:31:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:24,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:31:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:24,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:31:24,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:24,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-18 15:31:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:31:24,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:24,472 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-18 15:31:24,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-09-18 15:31:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:31:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709600005] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:24,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2024-09-18 15:31:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073644570] [2024-09-18 15:31:24,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:24,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:31:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:31:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:31:24,502 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:24,652 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2024-09-18 15:31:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:31:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-18 15:31:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:24,653 INFO L225 Difference]: With dead ends: 124 [2024-09-18 15:31:24,654 INFO L226 Difference]: Without dead ends: 88 [2024-09-18 15:31:24,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:31:24,654 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:24,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:31:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-18 15:31:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2024-09-18 15:31:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-18 15:31:24,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 28 [2024-09-18 15:31:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:24,666 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-18 15:31:24,666 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:24,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-18 15:31:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:31:24,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:24,667 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:24,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:31:24,867 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:24,868 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:24,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -461832489, now seen corresponding path program 1 times [2024-09-18 15:31:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:24,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511799190] [2024-09-18 15:31:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:24,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:24,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 15:31:24,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:24,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511799190] [2024-09-18 15:31:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511799190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:24,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869562496] [2024-09-18 15:31:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:24,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:24,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:24,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:24,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:31:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:25,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-18 15:31:25,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:25,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:25,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2024-09-18 15:31:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:31:25,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:25,199 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-18 15:31:25,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-09-18 15:31:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 15:31:25,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869562496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:25,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:25,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 9] total 18 [2024-09-18 15:31:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894416469] [2024-09-18 15:31:25,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:25,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:31:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:31:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:31:25,221 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:25,524 INFO L93 Difference]: Finished difference Result 152 states and 208 transitions. [2024-09-18 15:31:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:31:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-18 15:31:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:25,526 INFO L225 Difference]: With dead ends: 152 [2024-09-18 15:31:25,526 INFO L226 Difference]: Without dead ends: 114 [2024-09-18 15:31:25,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:31:25,527 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 323 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:25,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 210 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:31:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-18 15:31:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 48. [2024-09-18 15:31:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-09-18 15:31:25,544 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 30 [2024-09-18 15:31:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:25,544 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-09-18 15:31:25,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-09-18 15:31:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 15:31:25,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:25,547 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:25,562 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:31:25,751 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 15:31:25,752 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:25,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 450517516, now seen corresponding path program 1 times [2024-09-18 15:31:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509510639] [2024-09-18 15:31:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:25,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:31:25,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509510639] [2024-09-18 15:31:25,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509510639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912756411] [2024-09-18 15:31:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:25,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:25,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:25,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:31:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:25,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:31:25,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-18 15:31:25,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:31:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912756411] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:25,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:31:25,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 8 [2024-09-18 15:31:25,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288100783] [2024-09-18 15:31:25,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:31:25,929 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:31:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:31:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:31:25,930 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:25,954 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2024-09-18 15:31:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:31:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-18 15:31:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:25,955 INFO L225 Difference]: With dead ends: 83 [2024-09-18 15:31:25,956 INFO L226 Difference]: Without dead ends: 52 [2024-09-18 15:31:25,956 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:31:25,957 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:25,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:31:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-18 15:31:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-18 15:31:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-09-18 15:31:25,970 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 34 [2024-09-18 15:31:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:25,970 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-09-18 15:31:25,970 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:25,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-09-18 15:31:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:31:25,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:25,971 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:25,984 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:31:26,171 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:26,172 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1134559415, now seen corresponding path program 1 times [2024-09-18 15:31:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820853620] [2024-09-18 15:31:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:31:26,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:26,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820853620] [2024-09-18 15:31:26,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820853620] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:26,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016135497] [2024-09-18 15:31:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:26,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:26,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:26,297 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:31:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:26,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-18 15:31:26,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:31:26,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 15:31:26,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016135497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:26,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:26,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2024-09-18 15:31:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764733986] [2024-09-18 15:31:26,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:26,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:31:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:26,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:31:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:31:26,418 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:26,714 INFO L93 Difference]: Finished difference Result 297 states and 421 transitions. [2024-09-18 15:31:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:31:26,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-18 15:31:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:26,716 INFO L225 Difference]: With dead ends: 297 [2024-09-18 15:31:26,716 INFO L226 Difference]: Without dead ends: 254 [2024-09-18 15:31:26,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:31:26,717 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 288 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:26,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 233 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:31:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-18 15:31:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 65. [2024-09-18 15:31:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2024-09-18 15:31:26,735 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 37 [2024-09-18 15:31:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:26,735 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2024-09-18 15:31:26,735 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:26,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2024-09-18 15:31:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 15:31:26,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:26,736 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:26,748 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:26,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:26,940 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:26,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1612339571, now seen corresponding path program 2 times [2024-09-18 15:31:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:26,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603200] [2024-09-18 15:31:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:27,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:31:27,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:27,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603200] [2024-09-18 15:31:27,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:27,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773541382] [2024-09-18 15:31:27,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:31:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:27,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:31:27,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:31:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:27,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:31:27,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:31:27,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:31:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773541382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:27,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-18 15:31:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359631503] [2024-09-18 15:31:27,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:27,240 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:31:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:31:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:31:27,241 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:27,442 INFO L93 Difference]: Finished difference Result 309 states and 412 transitions. [2024-09-18 15:31:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:31:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-18 15:31:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:27,444 INFO L225 Difference]: With dead ends: 309 [2024-09-18 15:31:27,444 INFO L226 Difference]: Without dead ends: 254 [2024-09-18 15:31:27,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:31:27,445 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 149 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:27,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 419 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:31:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-18 15:31:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 66. [2024-09-18 15:31:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-09-18 15:31:27,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 44 [2024-09-18 15:31:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:27,471 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-09-18 15:31:27,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:27,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-09-18 15:31:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:31:27,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:27,472 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:27,486 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:31:27,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:27,674 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:27,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 974810732, now seen corresponding path program 3 times [2024-09-18 15:31:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:27,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292231447] [2024-09-18 15:31:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:27,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:28,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 15:31:28,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292231447] [2024-09-18 15:31:28,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292231447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206110652] [2024-09-18 15:31:28,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:31:28,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:28,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:28,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:28,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:31:28,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:31:28,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:28,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:31:28,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 15:31:28,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 15:31:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206110652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:28,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:28,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-09-18 15:31:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614217907] [2024-09-18 15:31:28,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:28,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:31:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:31:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:31:28,414 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:28,595 INFO L93 Difference]: Finished difference Result 182 states and 237 transitions. [2024-09-18 15:31:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:31:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:31:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:28,596 INFO L225 Difference]: With dead ends: 182 [2024-09-18 15:31:28,596 INFO L226 Difference]: Without dead ends: 176 [2024-09-18 15:31:28,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:31:28,597 INFO L434 NwaCegarLoop]: 98 mSDtfsCounter, 149 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:28,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 911 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:31:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-18 15:31:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 110. [2024-09-18 15:31:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 105 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2024-09-18 15:31:28,630 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 45 [2024-09-18 15:31:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:28,630 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2024-09-18 15:31:28,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:28,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2024-09-18 15:31:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:31:28,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:28,631 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:28,646 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:31:28,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 15:31:28,832 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:28,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash 581783722, now seen corresponding path program 1 times [2024-09-18 15:31:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143257018] [2024-09-18 15:31:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:31:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143257018] [2024-09-18 15:31:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143257018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222044049] [2024-09-18 15:31:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:29,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:29,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:31:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:29,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:31:29,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:29,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 15:31:29,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-18 15:31:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:31:29,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:30,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:30,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 57 [2024-09-18 15:31:30,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:30,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2024-09-18 15:31:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 15:31:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222044049] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:30,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 13] total 31 [2024-09-18 15:31:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661541311] [2024-09-18 15:31:30,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:30,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-18 15:31:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-18 15:31:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-09-18 15:31:30,466 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:34,186 INFO L93 Difference]: Finished difference Result 538 states and 741 transitions. [2024-09-18 15:31:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-18 15:31:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:31:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:34,188 INFO L225 Difference]: With dead ends: 538 [2024-09-18 15:31:34,188 INFO L226 Difference]: Without dead ends: 447 [2024-09-18 15:31:34,193 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1580, Invalid=8722, Unknown=0, NotChecked=0, Total=10302 [2024-09-18 15:31:34,193 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 483 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:34,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 415 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:31:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-09-18 15:31:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 228. [2024-09-18 15:31:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.304932735426009) internal successors, (291), 223 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2024-09-18 15:31:34,278 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 45 [2024-09-18 15:31:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:34,278 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2024-09-18 15:31:34,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:34,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2024-09-18 15:31:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:31:34,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:34,279 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:34,292 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:34,483 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:31:34,483 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:34,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1193665450, now seen corresponding path program 1 times [2024-09-18 15:31:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:34,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445785444] [2024-09-18 15:31:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:34,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:35,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-18 15:31:35,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445785444] [2024-09-18 15:31:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445785444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882204658] [2024-09-18 15:31:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:35,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:35,026 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:31:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:35,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-18 15:31:35,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:35,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-18 15:31:35,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:35,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2024-09-18 15:31:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:31:35,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:36,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:36,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 81 [2024-09-18 15:31:36,033 INFO L349 Elim1Store]: treesize reduction 25, result has 32.4 percent of original size [2024-09-18 15:31:36,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 63 [2024-09-18 15:31:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-18 15:31:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882204658] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:36,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:36,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 15] total 34 [2024-09-18 15:31:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973958107] [2024-09-18 15:31:36,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:36,117 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 15:31:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 15:31:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:31:36,118 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:39,681 INFO L93 Difference]: Finished difference Result 672 states and 881 transitions. [2024-09-18 15:31:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-18 15:31:39,682 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:31:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:39,683 INFO L225 Difference]: With dead ends: 672 [2024-09-18 15:31:39,683 INFO L226 Difference]: Without dead ends: 551 [2024-09-18 15:31:39,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2214, Invalid=9558, Unknown=0, NotChecked=0, Total=11772 [2024-09-18 15:31:39,686 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 516 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:39,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 280 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:31:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-09-18 15:31:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 307. [2024-09-18 15:31:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.2649006622516556) internal successors, (382), 302 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 386 transitions. [2024-09-18 15:31:39,806 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 386 transitions. Word has length 45 [2024-09-18 15:31:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:39,806 INFO L474 AbstractCegarLoop]: Abstraction has 307 states and 386 transitions. [2024-09-18 15:31:39,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:39,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 386 transitions. [2024-09-18 15:31:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:31:39,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:39,807 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:40,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:40,008 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:40,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash 213832426, now seen corresponding path program 1 times [2024-09-18 15:31:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671420784] [2024-09-18 15:31:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:40,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:31:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671420784] [2024-09-18 15:31:40,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671420784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504652550] [2024-09-18 15:31:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:40,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:40,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:40,724 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:40,725 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:31:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:40,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:31:40,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:40,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 15:31:40,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-18 15:31:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:31:40,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:41,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:41,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 55 [2024-09-18 15:31:41,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:41,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2024-09-18 15:31:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-18 15:31:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504652550] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:41,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 28 [2024-09-18 15:31:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609455132] [2024-09-18 15:31:41,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:41,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-18 15:31:41,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-18 15:31:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:31:41,263 INFO L87 Difference]: Start difference. First operand 307 states and 386 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:41,769 INFO L93 Difference]: Finished difference Result 488 states and 604 transitions. [2024-09-18 15:31:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:31:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:31:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:41,771 INFO L225 Difference]: With dead ends: 488 [2024-09-18 15:31:41,771 INFO L226 Difference]: Without dead ends: 431 [2024-09-18 15:31:41,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:31:41,772 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:41,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 186 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:31:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-09-18 15:31:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 304. [2024-09-18 15:31:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.2575250836120402) internal successors, (376), 299 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 380 transitions. [2024-09-18 15:31:41,890 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 380 transitions. Word has length 45 [2024-09-18 15:31:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:41,890 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 380 transitions. [2024-09-18 15:31:41,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:41,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 380 transitions. [2024-09-18 15:31:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:31:41,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:41,891 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:41,902 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:31:42,091 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:31:42,091 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:42,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 941187050, now seen corresponding path program 1 times [2024-09-18 15:31:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438970511] [2024-09-18 15:31:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:42,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:31:42,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438970511] [2024-09-18 15:31:42,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438970511] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367857928] [2024-09-18 15:31:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:42,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:42,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:42,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:42,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:31:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:42,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 15:31:42,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:43,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-09-18 15:31:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:31:43,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:43,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:43,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 40 [2024-09-18 15:31:43,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:43,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2024-09-18 15:31:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-18 15:31:43,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367857928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:43,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:43,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 28 [2024-09-18 15:31:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119972081] [2024-09-18 15:31:43,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:43,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-18 15:31:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-18 15:31:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:31:43,400 INFO L87 Difference]: Start difference. First operand 304 states and 380 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:44,044 INFO L93 Difference]: Finished difference Result 499 states and 621 transitions. [2024-09-18 15:31:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:31:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:31:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:44,047 INFO L225 Difference]: With dead ends: 499 [2024-09-18 15:31:44,047 INFO L226 Difference]: Without dead ends: 455 [2024-09-18 15:31:44,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=1213, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:31:44,050 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:44,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 350 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:31:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2024-09-18 15:31:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 314. [2024-09-18 15:31:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.2459546925566343) internal successors, (385), 309 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 389 transitions. [2024-09-18 15:31:44,208 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 389 transitions. Word has length 45 [2024-09-18 15:31:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:44,208 INFO L474 AbstractCegarLoop]: Abstraction has 314 states and 389 transitions. [2024-09-18 15:31:44,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:44,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 389 transitions. [2024-09-18 15:31:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 15:31:44,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:44,209 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:44,221 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-18 15:31:44,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:31:44,410 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:44,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash -128402447, now seen corresponding path program 1 times [2024-09-18 15:31:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:44,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510985962] [2024-09-18 15:31:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:44,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:44,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-18 15:31:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510985962] [2024-09-18 15:31:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510985962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205223458] [2024-09-18 15:31:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:44,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:44,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:31:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:44,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:31:44,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:44,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 15:31:44,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:44,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-09-18 15:31:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:31:44,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:45,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:45,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 73 [2024-09-18 15:31:45,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:45,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2024-09-18 15:31:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:31:45,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205223458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:45,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:45,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 15] total 33 [2024-09-18 15:31:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758413067] [2024-09-18 15:31:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:45,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-18 15:31:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-18 15:31:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 15:31:45,480 INFO L87 Difference]: Start difference. First operand 314 states and 389 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:46,679 INFO L93 Difference]: Finished difference Result 1131 states and 1421 transitions. [2024-09-18 15:31:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-18 15:31:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2024-09-18 15:31:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:46,682 INFO L225 Difference]: With dead ends: 1131 [2024-09-18 15:31:46,682 INFO L226 Difference]: Without dead ends: 857 [2024-09-18 15:31:46,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:31:46,683 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 266 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:46,683 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 646 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:31:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2024-09-18 15:31:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 402. [2024-09-18 15:31:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 397 states have (on average 1.234256926952141) internal successors, (490), 397 states have internal predecessors, (490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 494 transitions. [2024-09-18 15:31:46,855 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 494 transitions. Word has length 54 [2024-09-18 15:31:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:46,856 INFO L474 AbstractCegarLoop]: Abstraction has 402 states and 494 transitions. [2024-09-18 15:31:46,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:46,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 494 transitions. [2024-09-18 15:31:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 15:31:46,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:46,857 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:46,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 15:31:47,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:31:47,057 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:47,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1628474760, now seen corresponding path program 2 times [2024-09-18 15:31:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695790399] [2024-09-18 15:31:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:47,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-18 15:31:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695790399] [2024-09-18 15:31:47,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695790399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:47,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211635552] [2024-09-18 15:31:47,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:31:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:47,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:47,507 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:31:47,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:31:47,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:47,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-18 15:31:47,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:48,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:48,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-09-18 15:31:48,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-18 15:31:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 15:31:48,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:48,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:48,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 95 [2024-09-18 15:31:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:31:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211635552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:49,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 19] total 48 [2024-09-18 15:31:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041884175] [2024-09-18 15:31:49,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:49,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-18 15:31:49,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-18 15:31:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2024-09-18 15:31:49,078 INFO L87 Difference]: Start difference. First operand 402 states and 494 transitions. Second operand has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:50,270 INFO L93 Difference]: Finished difference Result 632 states and 780 transitions. [2024-09-18 15:31:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:31:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-18 15:31:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:50,273 INFO L225 Difference]: With dead ends: 632 [2024-09-18 15:31:50,273 INFO L226 Difference]: Without dead ends: 548 [2024-09-18 15:31:50,274 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=811, Invalid=3745, Unknown=0, NotChecked=0, Total=4556 [2024-09-18 15:31:50,274 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:50,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 562 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:31:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-09-18 15:31:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 373. [2024-09-18 15:31:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.2391304347826086) internal successors, (456), 368 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 460 transitions. [2024-09-18 15:31:50,449 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 460 transitions. Word has length 55 [2024-09-18 15:31:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:50,449 INFO L474 AbstractCegarLoop]: Abstraction has 373 states and 460 transitions. [2024-09-18 15:31:50,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:50,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 460 transitions. [2024-09-18 15:31:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:31:50,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:50,450 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:50,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-18 15:31:50,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 15:31:50,651 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:50,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -885254672, now seen corresponding path program 3 times [2024-09-18 15:31:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103373296] [2024-09-18 15:31:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:51,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-18 15:31:51,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103373296] [2024-09-18 15:31:51,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103373296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873562035] [2024-09-18 15:31:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:31:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:51,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:51,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:31:51,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:31:51,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:51,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:31:51,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:51,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-18 15:31:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-18 15:31:51,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:51,414 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-18 15:31:51,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2024-09-18 15:31:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-18 15:31:51,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873562035] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:51,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:51,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 21 [2024-09-18 15:31:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470713763] [2024-09-18 15:31:51,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:51,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:31:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:31:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:31:51,444 INFO L87 Difference]: Start difference. First operand 373 states and 460 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:51,898 INFO L93 Difference]: Finished difference Result 552 states and 689 transitions. [2024-09-18 15:31:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 15:31:51,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-18 15:31:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:51,901 INFO L225 Difference]: With dead ends: 552 [2024-09-18 15:31:51,901 INFO L226 Difference]: Without dead ends: 547 [2024-09-18 15:31:51,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:31:51,901 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:51,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 300 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:31:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2024-09-18 15:31:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2024-09-18 15:31:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.2344213649851632) internal successors, (416), 337 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 420 transitions. [2024-09-18 15:31:52,071 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 420 transitions. Word has length 56 [2024-09-18 15:31:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:52,071 INFO L474 AbstractCegarLoop]: Abstraction has 342 states and 420 transitions. [2024-09-18 15:31:52,071 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:52,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 420 transitions. [2024-09-18 15:31:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-18 15:31:52,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:52,072 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:52,084 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:31:52,273 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:52,273 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:52,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash 828990910, now seen corresponding path program 4 times [2024-09-18 15:31:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:52,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660113438] [2024-09-18 15:31:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:52,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:53,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:31:53,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:53,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660113438] [2024-09-18 15:31:53,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660113438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:53,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185985078] [2024-09-18 15:31:53,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:31:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:53,318 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:53,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:31:53,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:31:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:53,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 15:31:53,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:53,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:53,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2024-09-18 15:31:53,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-18 15:31:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:31:53,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:54,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:31:54,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2024-09-18 15:31:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-18 15:31:54,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185985078] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:54,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:54,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 15] total 42 [2024-09-18 15:31:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717104670] [2024-09-18 15:31:54,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:54,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-18 15:31:54,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-18 15:31:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 15:31:54,323 INFO L87 Difference]: Start difference. First operand 342 states and 420 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:56,466 INFO L93 Difference]: Finished difference Result 1718 states and 2218 transitions. [2024-09-18 15:31:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:31:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-18 15:31:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:56,471 INFO L225 Difference]: With dead ends: 1718 [2024-09-18 15:31:56,471 INFO L226 Difference]: Without dead ends: 1483 [2024-09-18 15:31:56,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=715, Invalid=4397, Unknown=0, NotChecked=0, Total=5112 [2024-09-18 15:31:56,473 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 395 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:56,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 634 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:31:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2024-09-18 15:31:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 716. [2024-09-18 15:31:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 711 states have (on average 1.2658227848101267) internal successors, (900), 711 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 904 transitions. [2024-09-18 15:31:56,893 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 904 transitions. Word has length 66 [2024-09-18 15:31:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:56,893 INFO L474 AbstractCegarLoop]: Abstraction has 716 states and 904 transitions. [2024-09-18 15:31:56,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:56,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 904 transitions. [2024-09-18 15:31:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-18 15:31:56,895 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:56,895 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:56,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-18 15:31:57,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:57,096 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:57,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -289774206, now seen corresponding path program 5 times [2024-09-18 15:31:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:57,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982092228] [2024-09-18 15:31:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:57,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:58,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 15:31:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982092228] [2024-09-18 15:31:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982092228] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369350639] [2024-09-18 15:31:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:31:58,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:58,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:58,491 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:31:58,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:31:59,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:31:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:59,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-18 15:31:59,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:59,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-18 15:31:59,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-18 15:32:00,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-18 15:32:00,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-18 15:32:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 15:32:00,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:32:00,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 15:32:00,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-09-18 15:32:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 47 refuted. 1 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:32:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369350639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:32:04,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:32:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 50 [2024-09-18 15:32:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476860358] [2024-09-18 15:32:04,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:32:04,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-18 15:32:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:32:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-18 15:32:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2110, Unknown=1, NotChecked=0, Total=2450 [2024-09-18 15:32:04,910 INFO L87 Difference]: Start difference. First operand 716 states and 904 transitions. Second operand has 50 states, 50 states have (on average 2.78) internal successors, (139), 50 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:33:59,977 WARN L293 SmtUtils]: Spent 1.87m on a formula simplification. DAG size of input: 99 DAG size of output: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:34:09,005 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 87 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:34:49,143 WARN L293 SmtUtils]: Spent 40.09s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:35:06,629 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 88 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:35:15,800 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 91 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:35:56,025 WARN L293 SmtUtils]: Spent 40.18s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)